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Huawei · PV inverters · Huawei SUN2000-KTL-M1 (three-phase inverter, 3–10 kW, battery-ready)

Alarm 2021AFCI Self-Check Failure

Name in the manufacturer's documentation (fault list): AFCI Self-Check Failure[1]

In plain words (editorial)

The self-check of the arc-fault circuit interrupter (AFCI) failed. The manual's procedure: turn off the AC and DC switches, wait 5 minutes, turn them back on and clear the alarm.

When to call a service technician: If the fault persists, the manual says to export the logs and contact technical support.

✎ editorial – written from the cited sources, not a manufacturer statement. Status: draft.

The Polish page has more detail (plain-language explanation, safe checks, guides): Read in Polish →

Sources

Every statement has a footnote to the document and PDF page. “Quote verified” means the quote was found automatically in the text of that page.

  1. [1] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 37 official manufacturer document quote verified 2021 AFCI Self-Check Failure
  2. [2] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 37 official manufacturer document quote verified the afci self-check fails.
  3. [3] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 37 official manufacturer document quote verified turn off the ac and dc switches, wait for 5 minutes, and then turn on the ac and dc switches. then, manually clear the alarm.
  4. [4] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 37 official manufacturer document quote verified if the fault persists, export logs and contact technical support.